Multiwavelength optical and NIR variability analysis of the Blazar PKS 0027-426
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Data
2022-01-08
Autores
Guise, E.
Honig, S. F.
Almeyda, T.
Horne, K.
Kishimoto, M.
Aguena, M.
Allam, S.
Andrade-Oliveira, F. [UNESP]
Asorey, J.
Banerji, M.
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Editor
Oxford Univ Press
Resumo
We present multiwavelength spectral and temporal variability analysis of PKS 0027-426 using optical griz observations from Dark Energy Survey between 2013 and 2018 and VEILS Optical Light curves of Extragalactic TransienT Events (VOILETTE) between 2018 and 2019 and near-infrared (NIR) JKs observations from Visible and Infrared Survey Telescope for Astronomy Extragalactic Infrared Legacy Survey (VEILS) between 2017 and 2019. Multiple methods of cross-correlation of each combination of light curve provides measurements of possible lags between optical-optical, optical-NIR, and NIR-NIR emission, for each observation season and for the entire observational period. Inter-band time lag measurements consistently suggest either simultaneous emission or delays between emission regions on time-scales smaller than the cadences of observations. The colour-magnitude relation between each combination of filters was also studied to determine the spectral behaviour of PKS 0027-426. Our results demonstrate complex colour behaviour that changes between bluer when brighter, stable when brighter, and redder when brighter trends over different time-scales and using different combinations of optical filters. Additional analysis of the optical spectra is performed to provide further understanding of this complex spectral behaviour.
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galaxies: active, quasars: individual: PKS 0027-426, galaxies: jets
Como citar
Monthly Notices Of The Royal Astronomical Society. Oxford: Oxford Univ Press, v. 510, n. 3, p. 3145-3177, 2022.